Reinstall driver after USB port chang

Dear Sirs.
Win xp always ask me to reinstall driver after my USB device chang port.
Is there any ways to avoid this reinstalling problem?


Venny

 

Add the unique ID to your device.

 

Yes

 

Did you mean "SerialNumber " String descriptor?

 

Dear Maxim S. Shatskih

Do you mean "SerialNumber " String descriptor?

v

 

How come?

 

b/c w/out the serial number, windows does not know if it is a new device
that is plugged into the different port or the old one. it treats it as a
new device. if there is a serial number, windows can track the device from
port to port.

d

 

But. i had check other device it appears don't support
serial number in device descriptor(iSerialNumber has a value 0x00).
It can plug into another port and no need to ask user for the inf file.
(it does the installation from the inf that already installed in system.)

Could i do that too? User will complain the inf required again.
They will kick my ass....

v

 

Is your install package properly signed?

--

=====================
Mark Roddy DDK MVP
Windows 2003/XP/2000 Consulting
Hollis Technology Solutions 603-321-1032
www.hollistech.com

 

Exactly , serial number for USB will work for signed driver only
Arkady

 

Dear sirs

Yes , we had tried to support number for our unsigned driver. it worked.
but supporting serial number has big problem in mass production. It need
one more additional operation to burn the serial number on each difference
device,
the operation add the cost and customers always not like it.
They can accept system auto reinstall the driver, but require the inf again.
The mentioned device :

also not support serialnumber and it works fine.
how can it do ?


v

 

By the way..
we had tried to burn the same serial number on two devices,
The second device will not be drived when we plug
the two devices on a system at the same time.



is it normal?

 

No, if the device has a serial number, it doesn't matter is the driver is
signed or not.

 

yes, this is normal. you are violating the rule that each serial number
must be unique

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Dear Doron Holan

we had tried to support number for our unsigned driver. it worked.
but supporting serial number has big problem in mass production. It need
one more additional operation to burn the serial number on each difference
device,
the operation add the cost and customers always not like it.
They can accept system auto reinstall the driver, but require the inf
again.

The mentioned device :
also not support serialnumber and it works fine.
how can it do ?


v

 

Sorry here, I have a question. How is serial number burned? Could it be
changed later?

Julia

 

It all depends on how your device stores it.

 

That correct , but it complain ( "ask user for the inf file" ) without
signature
Arkady

 

Only for the first time for a device with this serial number.

 

Dear Doron Holan
I am trying to get the WHQL signature, before the submition.
I need to know how to avoid the "ask user for inf file" appears
every time user plug it to a new port.
Will the OS compaint disappear after WHQL, no matter what
the serial number supported or not?

v